Zhen Huang（黄桢）

PhD Candidate, Mathematics, UC Berkeley | Applied Math & Quantum Many-body Physics

Zhen Huang
Pronunciation of my name

I'm currently a PhD candidate in Department of Mathematics, University of California, Berkeley, supervised by Prof. Lin Lin.

Here is my CV. See also my research page.

I am also currently one of the moderators for the Math290 quantum many body seminar. Contact me if you would like to give a 40-min tutorial talk or 20-min research update talk in our seminar.

Contact: hertz at math dot berkeley dot edu

Research Interests

One of the most fundamental problems in physics and chemistry is to understand quantum matter at the many-body level. My research aims to develop low-scaling, high-accuracy computational tools that can calculate and predict properties of correlated matter in and out-of-equilibrium. This direction lies at the intersection of applied mathematics, condensed matter physics, and quantum chemistry. My long-term goal is to work towards increasingly realistic simulations of quantum materials by advancing computational techniques, mathematical modeling, and high-performance computing. Such developments have immediate impacts on applications ranging from novel materials design to quantum computing.

Recently I have worked on dynamical mean-field theory, quantum embedding, non-Markovian open quantum systems, many-body Green’s functions and electronic structure theory. The computational challenges arising from these areas span various computational topics, including (randomized) numerical linear algebra, rational approximation, ill-posed inverse problems, and high-dimensional partial differential equations.

Read here for more details.

Electron correlation

Publications and Preprints

See also Google Scholar.

  1. Provably Efficient Long-Time Exponential Decompositions of Non-Markovian Gaussian Baths.
    Zhen Huang, Zhiyan Ding, Ke Wang, Jason Kaye, Xiantao Li, Lin Lin, [arXiv]
  2. Coupled Lindblad pseudomode theory for simulating open quantum systems.
    Zhen Huang, Gunhee Park, Garnet Kin-Lic Chan, Lin Lin. Phys. Rev. Lett. 136, 090403 [arXiv]
  3. Automated evaluation of imaginary time strong coupling diagrams by sum-of-exponentials hybridization fitting.
    Zhen Huang, Denis Golež, Hugo U. R. Strand, Jason Kaye. SciPost Phys. 19, 121 (2025) [journal]
  4. Unified analysis of non-Markovian open quantum systems in Gaussian environment using superoperator formalism.
    Zhen Huang, Yuanran Zhu, Gunhee Park, Lin Lin. (Last updated: Dec 2025) [arXiv]
  5. Frozen Gaussian sampling algorithms for simulating Markovian open quantum systems in the semiclassical regime
    Limin Xu, Zhen Huang, Zhennan Zhou. [arXiv]
  6. Real-time propagation of adaptive sampling selected configuration interaction wave function.
    Avijit Shee, Zhen Huang, Martin Head-Gordon, K. Birgitta Whaley. The Journal of Chemical Physics 162.12, 2025 [journal]
  7. Renormalization of States and Quasiparticles in Many-body Downfolding.
    Annabelle Canestraight, Zhen Huang, Lin Lin, and Vojtech Vlcek. J. Chem. Phys., 163, 024114 (2025) [journal]
  8. Quasi-Lindblad pseudomode theory for open quantum systems.
    Gunhee Park, Zhen Huang, Yuanran Zhu, Chao Yang, Garnet Kin-Lic Chan, Lin Lin. Physics Review B, 110, 195148, 2024 [journal].
  9. Decomposing imaginary time Feynman diagrams using separable basis functions: Anderson impurity model strong coupling expansion.
    Jason Kaye, Zhen Huang, Hugo U. R. Strand, Denis Golež. Physics Review X, 14, 031034, 2024.[journal]
  10. Stochastic Schrödinger equation approach to real-time dynamics of Anderson–Holstein impurities: An Open Quantum System Perspective.
    Zhen Huang, Limin Xu, Zhennan Zhou. Journal of Chemical Theory and Computation 20 (2), 946-962, 2024.[journal]
  11. Robust analytic continuation of Green's functions via projection, pole estimation, and semidefinite relaxation.
    Zhen Huang, Emanuel Gull, Lin Lin. Physics Review B 107, 075151, 2023.[journal], [arXiv]
  12. Revealing excited states of rotational Bose-Einstein Condensates.
    Jianyuan Yin, Zhen Huang, Yongyong Cai, Qiang Du, Lei Zhang. The Innovation 5 (1).[journal]
  13. Efficient Frozen Gaussian Sampling algorithms for nonadiabatic quantum dynamics at metal surfaces.
    Zhen Huang, Limin Xu, Zhennan Zhou. Journal of Computational Physics 474, 111771, 2023.[journal]
  14. Constrained High-Index Saddle Dynamics for the solution landscape with equality constraints.
    Jianyuan Yin, Zhen Huang, Lei Zhang. Journal of Scientific Computing 91 (2), 1-23, 2022.[journal]

Open Software

I am committed to building open-source software that is user-friendly, well-documented, and implements state-of-the-art algorithms.

  1. triqs_xca: Generic multiband impurity solver based on hybridization expansion. Highlights are multi-band, beyond low-order diagrams, and fast deterministic evaluation through optimal compression and parallelization. See documentation and github.
    • Core developer. With J. Kaye, H. Strand and D. Golez.
    • Stay tuned for a further improvement employing sparsity, led by P. Rilloraza, J. Kaye and H. Strand.
  2. Adapol: Adaptive pole fitting for quantum many body physics. See documentation and github.
    • Core developer. With C. Yeh, L. Lin, J. Kaye, N. Wentzell.

Selected Talk Slides

Slides from recent talks and seminars:

  1. Provably efficient long-time exponential decompositions of non-Markovian Gaussian baths.
  2. Towards low-scaling algorithms for strongly correlated systems,
  3. Fast imaginary-time Feynman diagrams evaluation and robust bath fitting,
  4. Robust analytic continuation methods for Green's functions, March 2023, [PDF].

Teaching and Mentoring

If you are a student interested in quantum + numerics, feel free to drop me a line.

Contact

Email: hertz at math dot berkeley dot edu

I'm also affiliated with the Mathematics Group of the Applied Mathematics and Computational Research Division at LBL.



© 2026 Zhen Huang